package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.record.chart.BeginRecord;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.SortParameters;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * ClassName:ReportServiceImpl
 * Package:com.sky.service.impl
 * Description:
 *
 * @Author: zongyu
 * @Create: 2023/12/19 - 11:16
 */
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 统计指定时间区间内的营业额
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //用于存放从begin到end的每一天日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //日期计算,计算指定日期的后一天的
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        TurnoverReportVO turnoverReportVO = new TurnoverReportVO();

        List<Double> turnoverList = new ArrayList<>();
        //select SUM()
        for (LocalDate localDate : dateList) {
            //查询当天，状态为已完成的订单的金额合计，
            //select SUM(amount) from orders where order_time > ? and order_time < ? and status = 5
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);

            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        turnoverReportVO.setDateList(StringUtils.join(dateList, ","));
        turnoverReportVO.setTurnoverList(StringUtils.join(turnoverList,","));
        return turnoverReportVO;
    }
    /**
     * 统计指定时间区间内的用户数据
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //用于存放从begin到end的每一天日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //日期计算,计算指定日期的后一天的
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        //存放每天的总用户量
        List<Integer> userList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();

            map.put("end",endTime);
            Integer totalUser = userMapper.countByMap(map);
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            userList.add(totalUser);
            newUserList.add(newUser);
        }
        UserReportVO userReportVO = new UserReportVO();
        userReportVO.setDateList(StringUtils.join(dateList,","));
        userReportVO.setNewUserList(StringUtils.join(newUserList,","));
        userReportVO.setTotalUserList(StringUtils.join(userList,","));
        return userReportVO;
    }
    /**
     * 统计指定时间区间内的订单数据
     * @param begin
     * @param end
     * @return
     */

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //用于存放从begin到end的每一天日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            //日期计算,计算指定日期的后一天的
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        //遍历dateList集合，查询每天的有效订单数和订单总数
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询每天的订单总数
            Integer orderCount = getOrderCount(beginTime,endTime,null);
            //查询每天的有效订单数
            Integer validOrderCount = getOrderCount(beginTime,endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //计算时间区间内的订单总数
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数
        Integer validOrderCount =  validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0){
            orderCompletionRate = (double) (validOrderCount/totalOrderCount);
        }
        OrderReportVO build = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .build();
        return build;
    }
    /**
     * 统计指定时间内销量前10
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTOP10 = orderMapper.getSalesTOP10(beginTime, endTime);
        List<String> names = salesTOP10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");
        List<Integer> numbers = salesTOP10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");
        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }
    /**
     * 到处运营数据报表
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) throws IOException {

        //1、查询数据库，获取营收数据————最近三十天营业额、订单完成率、新增用户数、有效订单、平均客单价
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
        //2、通过POI将数据写入Excel表中

        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        //基于模板文件创建一个新的excel文件
        XSSFWorkbook excel = new XSSFWorkbook(in);
        XSSFSheet sheet = excel.getSheet("Sheet1");
        //填充数据---时间
        sheet.getRow(1).getCell(1).setCellValue("时间:" + dateBegin + "至" + dateEnd);
        //填充数据---营业额、订单完成率、新增用户数
        XSSFRow row = sheet.getRow(3);
        row.getCell(2).setCellValue(businessDataVO.getTurnover());
        row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
        row.getCell(6).setCellValue(businessDataVO.getNewUsers());
        //填充数据---有效订单数、平均客单价
        row = sheet.getRow(4);
        row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
        row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
        //填充明细数据
        for (int i = 0; i < 30; i++) {
            LocalDate date = dateBegin.plusDays(i);
            BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
            //获得某一行
            row = sheet.getRow(7 + i);
            row.getCell(1).setCellValue(date.toString());
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(3).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(5).setCellValue(businessData.getUnitPrice());
            row.getCell(6).setCellValue(businessData.getNewUsers());

        }
        //3、通过输出流，把excel文件下载到客户端
        ServletOutputStream out = response.getOutputStream();
        excel.write(out);
        //关闭资源
        out.close();
        excel.close();



    }

    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map = new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status", Orders.COMPLETED);
        return orderMapper.countByMap(map);
    }
}
